如图,抛物线\(E\):\(y^{2}=2px(p > 0)\)与圆\(O\):\(x^{2}+y^{2}=8\)相交于\(A\),\(B\)两点,且点\(A\)的横坐标为\(2.\)过劣弧\(AB\)上动点\(P(x_{0},y_{0})\)作圆\(O\)的切线交抛物线\(E\)于\(C\),\(D\)两点,分别以\(C\),\(D\)为切点作抛物线\(E\)的切线\(l_{1}\),\(l_{2}\),\(l_{1}\)与\(l_{2}\)相交于点\(M\).
\((\)Ⅰ\()\)求\(p\)的值;
\((\)Ⅱ\()\)求动点\(M\)的轨迹方程.